1996
DOI: 10.1016/s0168-9002(96)80029-5
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Absolute measurement of radon 222 activity

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Cited by 57 publications
(22 citation statements)
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“…The most critical part of the calibration system is thus the actual activity of the reference radium sources and the diffi culty of extracting the whole radon gas from the bubblers. In order to control these aspects, three methods are followed: 1) the 'absolute method' using radon sealed in glass vial [2]; 2) comparison with reference radon sources of the Czech Metrological Institute (CMI); 3) participation to international intercomparison organized by Consultative Committee for Ionizing Radiation (CCRI) -BIPM. The sources used for 'absolute method' are two glass vial, fl ame sealed, containing about 5 kBq of radon: their activity was determined by  spectrometry measurements (in 4 geometry), with a NaI well detector.…”
Section: The Quality Control Of the Primary Radon Reference Measuremementioning
confidence: 99%
“…The most critical part of the calibration system is thus the actual activity of the reference radium sources and the diffi culty of extracting the whole radon gas from the bubblers. In order to control these aspects, three methods are followed: 1) the 'absolute method' using radon sealed in glass vial [2]; 2) comparison with reference radon sources of the Czech Metrological Institute (CMI); 3) participation to international intercomparison organized by Consultative Committee for Ionizing Radiation (CCRI) -BIPM. The sources used for 'absolute method' are two glass vial, fl ame sealed, containing about 5 kBq of radon: their activity was determined by  spectrometry measurements (in 4 geometry), with a NaI well detector.…”
Section: The Quality Control Of the Primary Radon Reference Measuremementioning
confidence: 99%
“…2 shows the response values of the MWIIC due to the time resolution of 10 min. The certified reference time for the radon activity standard (Picolo, 1996;Dersch, 1998) is marked and is chosen to be t ¼0 for the following measurement. The injection of the activity A is performed at t c ¼ 792 min.…”
Section: Calibration Of the Mwiicmentioning
confidence: 99%
“…For the realization of the reference atmospheres, there are two different primary methods available at the PTB: 1) the radon-in-air activity standard (Picolo, 1996;Dersch, 1998) and 2) the emanation source.…”
Section: Experimental Set-up Of the Low-level Radon Reference Chambermentioning
confidence: 99%